CN101192964B - Master/slave switching system and method for multicast source - Google Patents
Master/slave switching system and method for multicast source Download PDFInfo
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Abstract
The invention discloses a master/slave switching system for multicast source, and a method thereof, which relate to multicasting transmission protection technology and are invented in order to solve a problem that the multicast source is not stable in the prior art. The invention comprises a multicast source server and a multicast agent server; and the multicast source server comprises a master server for multicast source and a standby server for multicast source. The multicast agent server is respectively connected with the multicast source server and the standby server for multicast source and is used for internally providing the master server for multicast source and the standby server for multicast source with cooperative interfaces and externally converting data stream source addresses of the master server for multicast source and of the standby server for multicast source into the same pubic IP address and forwarding the multicast source data stream. Through dual CPU hot-redundancy, the invention ensures multicast source data stream program is not interrupted and enhances stability of the multicast source and service quality of the multicasting program.
Description
Technical field
The present invention relates to the resist technology of multicast transmission, relate in particular to multicast source master-slave conversion system and method.
Background technology
Multicasting technology is a kind of technology that realizes point-to-multipoint or multi-multipoint communication, the fundamental characteristics of multicasting technology is described in RFC1112 to some extent, utilizing multicasting technology to realize easily will be such as the multimedia audio-video data from the transmission of server to a plurality of clients, no matter what clients are arranged, server all only needs to send once, this shows that multicasting technology can either conserve network resources, can reduce the live load of server again.
Group in the multicasting technology is a logical concept, is not a fixing physical entity group, and any terminal that can the accesses network resource can add multicast group, and is not subjected to the physical location of himself and the restriction of existing group membership's quantity.Terminal utilizes IGMP (Internet Group Management Protocol is used for the IPv4 network) or MLD (being used for the IPv6 network) agreement to finish the process of adding group in the local area network (LAN) scope.
Characteristics based on above-mentioned multicasting technology, very suitable point-to-multipoint or the multi-multipoint streaming media service of being applied to of multicasting technology, such as the TV that generally uses, media resources such as broadcasting can be transplanted to Internet and upward offer the user as streaming media service, the characteristics that this class is used are that data traffic is big, it is more diffusing that the user may distribute, therefore, in order to guarantee the quality of multicast service, IETF (Internet Engineering Task Force, internet task group) formulated multiple corresponding protocol, comprise that multicast routing protocol is (such as PIM-SM, CBT, BGMP etc.), RTP (RTP), RTCP (RTCP Real-time Transport Control Protocol) and RSVP (RSVP) etc., these agreements are used in combination according to business, guarantee for the service quality of multicast service provides basic transmission.
The formulation of above-mentioned agreement can guarantee the quality control of multicast source data flow in transmission course substantially, but the long-time steady operation of multicast source but is an even more important prerequisite guaranteeing multicast service quality, shown in Figure 1 is traditional multicast source configuration mode, multicast source server 100 directly is connected on the multicast router 101, under the influence of virus or software defect etc., the system problem that produces because of working long hours may cause the instability of multicast source, can cause the unexpected interruption of multicast service when serious, cause the user not receive the problem of multicast packet.
Summary of the invention
In order to overcome above-mentioned defective, the object of the present invention is to provide a kind of multicast source master-slave conversion system of stable multicast source.
For achieving the above object, a kind of multicast source master-slave conversion system of the present invention comprises multicast source server and multicast agent server; Described multicast source server comprises: multicast source master server and multicast source standby server,
The multicast agent server is connected with the multicast source standby server with described multicast source master server respectively, and be used for internally providing the cooperation interface for multicast source master server and multicast source standby server, externally the datastream source address transition with multicast source master server and multicast source standby server is identical outer net address, the forwarding multicasting source traffic;
Further, the multicast functionality of described multicast source server comprises: management plane, control plane and datum plane;
Described management plane comprises: first data interface module, the first control interface module, user's configuration interface module and policy management module;
Described first data interface module is used for the transmitting-receiving of the data message of described management plane and datum plane;
The described first control interface module is used for the transmitting-receiving of the data message of described management plane and control plane;
Described user's configuration interface module is used for the keeper provides operation-interface to the configuration of the working strategies of multicast source server;
Described policy management module is used for the working strategies of administrative institute's configuration;
Described control plane comprises: the first management interface module, second data interface module, opposite end analysis module and switch control module, the opposite end analysis module is used to monitor the operating state of multicast source master server/multicast source standby server, receive and analyze the multicast source data flow that the opposite end server sends, switching control module is used for controlling switching between multicast source master server and the multicast source standby server according to the result of opposite end analysis module analysis and the working strategies that is disposed, the first management interface module is used for the transmitting-receiving of the data message of described control plane and management plane, and second data interface module is used for the transmitting-receiving of the data message of described control plane and datum plane;
Further, described datum plane comprises: the second management interface module, the second control interface module, playing programs control module, business diagnosis module and communication control module;
The described second management interface module is used for the transmitting-receiving of the data message of described datum plane and management plane;
The described second control interface module is used for the transmitting-receiving of the data message of described datum plane and control plane;
Described playing programs control module is used to receive the data message from the described second management interface module and the second control interface module, starts or stops the transmission of the multicast source data flow of book server according to the data message that receives;
Described business diagnosis module is used for the progress of the multicast source data flow of book server is sent to second control interface module and the communication control module of this datum plane;
The masterslave switchover that described communication control module is used to analyze the masterslave switchover control message of opposite end server and send book server is controlled message.
Further, described multicast agent server is connected with the multicast source standby server with the multicast source master server respectively by the physical transmission medium of sharing, and operation multicast source masterslave switchover control protocol between multicast agent server and the described multicast source server.
Further, between described multicast source server and the multicast agent server multicast router is set.
The present invention is by the two-node cluster hot backup of multicast source server, under the cooperation of multicast agent server, can make ICP that reliable multicast program is provided, help under unexpected situation or when carrying out system maintenance, multicast source data flow program can not interrupt, and promotes the service quality of program.
Description of drawings
Fig. 1 is existing multicast source allocation plan;
Fig. 2 is active and standby pair of multicast source system construction drawing among the present invention;
Fig. 3 has the high-level schematic functional block diagram of the multicast source server of masterslave switchover ability for the present invention;
Fig. 4 is the of the present invention pair of active and standby collaborative work mode of a multicast source server schematic diagram;
Fig. 5 is a multicast source server inner function module structural relation schematic diagram of the present invention.
Embodiment
The present invention is mainly by being provided with multicast source master server, multicast source standby server and a multicast agent server, and be equipped with the active and standby control protocol of operation multicast source between server and the multicast agent server at multicast source master server, multicast source, make the stable operation under any circumstance of multicast source server.
Below in conjunction with accompanying drawing the multicast source master-slave conversion system of multicast source server stable operation that makes of the present invention is described in further detail: as shown in Figure 2, multicast source master-slave conversion system of the present invention is made of two multicast sources and an acting server of a multicast source master server, a multicast source standby server, multicast source system 100 among this figure is corresponding to the multicast source server 100 among Fig. 1,201 and 202 is multicast source servers of two congenerous, the 203rd, the physical transmission medium of sharing, the 204th, multicast agent server, the 205th, multicast router.Wherein, multicast source master server 201 directly is connected with the link of multicast source standby server 202 by shared physical transmission medium 203, if IPv4 network, then multicast source master server 201 and multicast source standby server 202 map network interface configuration are the interior net address of same network segment, if IPv6 network, then the map network interface of multicast source master server 201 and multicast source standby server 202 all is configured to the link-local address of identical network prefix, transfers the datastream source address of two multicast source servers (multicast source master server 201 and multicast source standby server 202) to identical outer net address by multicast agent server 204.
Wherein, multicast source master server 201 is identical with the function of multicast source standby server 202, the multicast source data flow of identical content can both be provided, just be configured to active and standby two ranks (also can be described as master and slave configuration) in the present invention, 201 is the multicast source master server, 202 is the multicast source standby server, also can be provided with 202 and be the multicast source master server, and 201 is the multicast source standby server.The multicast functionality of multicast source master server 201 and multicast source standby server 202 is made up of three parts: management plane, control plane and datum plane, as shown in Figure 3, wherein management plane and control plane are operated in the application layer of OSI 7 layer models, and datum plane then runs through application layer to data link layer.
Fig. 4 is the master of multicast source, be equipped with the dual server system schematic diagram, ICP (Internet Content Provider, ICP) on the server of oneself, provides multicast program, every suit program all provides service by a pair of server, remaining identical configuration on this two-server, comprise the multicast address that group broadcasting program is shared, programme content etc., and by the server administrators of ICP by management plane manually wherein a certain station server be set to the multicast source master server, another is set to the multicast source standby server, and perhaps two-server consults to determine active and standby branch voluntarily at management plane.Operation multicast source masterslave switchover control protocol between multicast source master server and multicast source standby server and multicast agent server (such as, Multicast Source of Master-Slave Control Protocol, i.e. MSMSCP).In addition, the ICP server administrators also need to be provided with the working strategies of the active and standby server of multicast source, the working strategies of the active and standby server of multicast source comprises the content of several aspects: first, when the multicast source master server can not continue multicast services is provided because of accident, after the differentiation time that limits, take over the work of former multicast source master server by the multicast source standby server, this differentiation time also is by the ICP administrator configurations, should be not cause too much time delay to exceed to the user.The second, need temporary transient the shutdown to safeguard that should reinstate the multicast source standby server as the multicast source master server this moment after the multicast source master server long-play.The 3rd, allow the ICP administrator hand to start masterslave switchover.Put it briefly, the masterslave switchover strategy can be summed up as substantially: unintended emergency is switched, timing automatic is switched and it is several to manually boot switching etc.
Fig. 5 be possess the masterslave switchover ability the multicast source server three function planes internal structure and concern schematic diagram, interface module with other two planes is all arranged on each plane, the transmitting-receiving of protocol massages is carried out on each plane by these interface modules, the transmitting-receiving that is the protocol massages of management plane and control plane is undertaken by the control interface module, and the transmitting-receiving of the protocol massages of management plane and datum plane is undertaken by data interface module; As a same reason, management interface module and data interface module are arranged also on the control plane, finish transmitting-receiving respectively with the protocol massages of management plane and datum plane; Datum plane has management interface module and control interface module, finishes the transmitting-receiving with the protocol massages of management plane and control plane respectively.
The effect of management plane is: for the keeper provides operation-interface, i.e. 501 user's configuration interface modules, so that the keeper can be provided with the working strategies (content of working strategies can with reference to foregoing description) of multicast source server by 502 policy management module, and configuration program parameter, the configuration main and standby relation starts or stops program and sends or the like.
The effect of control plane is: coordinate the operating state of active and standby two servers of multicast source, and control masterslave switchover process, respectively by opposite end analysis module 503 with switch control module 504 and realize;
The effect of datum plane is: carry out the transmission of multicast source data flow, 505 playing programs control modules are accepted the instruction from other two planes, are responsible for starting/stopping the program transmission of book server; Business diagnosis module 506 sends scheduling period ground is notified to book server by the control interface module control plane with book server, and the communication control module 507 on notification data plane, another effect of 506 is when book server is standby server, carry out the opposite end business diagnosis and report control plane, the masterslave switchover of the control plane of 507 communication control modules analysis opposite end server is controlled message and is sent the masterslave switchover control message of the control plane of book server.In addition, datum plane all leaves interface (management interface module and control interface module) to management plane and control plane, is used for being started or stoped by these two planes the transmission of datum plane.
The effect of multicast agent server 204 is: it seems that from the outside whole multicast source main preparation system is a single source, acting server has shielded the operation of internal system, and unified source address externally is provided; The masterslave switchover information that multicast agent server 204 is explained from multicast source server controls plane, and carve the multicast source data flow that switching is transmitted in due course, cooperate the masterslave switchover process that realizes.
The flow process of 4 and 5 pairs of multicast source main of the present invention describes in conjunction with the accompanying drawings: it mainly comprises:
(1) be that two multicast source servers dispose its main and standby relation and working strategies;
(2) start the multicast source master server, when operate as normal, the multicast source master server notified the multicast source standby server to be about to program, transmitting time and the transmission rate that sends before beginning to send program, when the multicast source master server needs to change some programs transmission parameters in process of transmitting, by control plane notice multicast source standby server; The multicast source standby server monitors the process of transmitting of multicast source master server by control plane, can adopt initiatively method for monitoring, it is the way of real-time tracking, complete reception is also analyzed the data flow that the multicast source master server sends, thereby know that real-time program sends progress, also can adopt the PASSIVE SURVEILLANCE method, i.e. real-time tracking but do not analyze the multicast source data flow, and by multicast source master server timed sending program progress msg.Switch when taking place, control plane all will write down the reversed process daily record, and reports the keeper at every turn;
(3) when the multicast source master server stops to send multicast packet, initiate the multicast source masterslave switchover according to the working strategies of configuration, and notice multicast acting server;
When accident causes the multicast source master server to stop to serve suddenly, the function for monitoring of the control plane of multicast source standby server finished to conclude that the multicast source master server has stopped under the situation of multicast services in the differentiation time, take over transmission work according to the program progress msg that oneself writes down immediately, and oneself be set to the master server state;
The fortuitous event of multicast source master server is not, and to be that multicast functionality is out of control cause, such as, in the playing programs process, the multicast source master server is found employed program source data failure, this moment multicast source standby server and do not know that master server goes wrong, in this case, should by master server switching request be proposed initiatively by multicast source;
When server carries out active and standby auto switching according to schedule, can switching request at first be proposed by the either party, a square tube that accepts request knows that the other side oneself accepts request, and know the multicast agent server by a certain square tube, multicast source standby server oneself is set to the master server state afterwards, begins transmission work according to the program progress that is write down;
When server administrators carry out manual intervention and start masterslave switchover, can from active and standby either party start this process, except switching request is by manually starting, other switching operation process is all consistent with automatic masterslave switchover process.
(4) the multicast agent server receive multicast source master server and multicast source standby server switch notice after, stop forwarding the multicast source data flow of former multicast source master server, and then begin to transmit the multicast source data flow of former multicast source standby server.
(5) original multicast source master server oneself is set to stand-by state automatically, and stops to send the multicast source data flow.
The system and method for above-mentioned multicast source masterslave switchover, two-node cluster hot backup by the multicast source server, under the cooperation of multicast agent server, can make ICP that reliable multicast program is provided, help under unexpected situation or when carrying out system maintenance, multicast source data flow program can not interrupt, and promotes the service quality of program.Also can adopt other scheme to set up active and standby multicast source, such as between multicast agent server and multicast source server, adding multicast router, active and standby like this two servers just can be distributed in different places, realize remote backup by router, this moment the multicast source standby server for the need of work of monitoring the multicast source master server by agreement applications such as IGMP/MLD from multicast source master server receiving group source traffic, so that multicast router carries out correct forwarding according to application.
Under the implementation of the active and standby two-shipper work of other class multicast program, still can continue to use basic thought of the present invention, to promote the stability of program source, avoid user's program reception to be affected.System configuration provided by the invention guarantees can also be used for program interruption, interactive multicast service etc. the program continuity except being used for masterslave switchover.
Claims (3)
1. a multicast source master-slave conversion system comprises multicast source server and multicast agent server; Described multicast source server comprises: multicast source master server and multicast source standby server; The multicast agent server is connected with the multicast source standby server with described multicast source master server respectively, and be used for internally providing the cooperation interface for multicast source master server and multicast source standby server, externally the datastream source address transition with multicast source master server and multicast source standby server is identical outer net address, the forwarding multicasting source traffic;
It is characterized in that the multicast functionality of described multicast source server comprises: management plane, control plane and datum plane;
Described management plane comprises: first data interface module, the first control interface module, user's configuration interface module and policy management module;
Described first data interface module is used for the transmitting-receiving of the data message of described management plane and datum plane;
The described first control interface module is used for the transmitting-receiving of the data message of described management plane and control plane;
Described user's configuration interface module is used to the keeper to provide operation-interface to the configuration of the working strategies of multicast source server;
Described policy management module is used for the working strategies of administrative institute's configuration;
Described control plane comprises: the first management interface module, second data interface module, opposite end analysis module and switch control module, the opposite end analysis module is used to monitor the operating state of multicast source master server/multicast source standby server, receive and analyze the multicast source data flow that the opposite end server sends, switching control module is used for controlling switching between multicast source master server and the multicast source standby server according to the result of opposite end analysis module analysis and the working strategies that is disposed, the first management interface module is used for the transmitting-receiving of the data message of described control plane and management plane, and second data interface module is used for the transmitting-receiving of the data message of described control plane and datum plane;
Described datum plane comprises: the second management interface module, the second control interface module, playing programs control module, business diagnosis module and communication control module;
The described second management interface module is used for the transmitting-receiving of the data message of described datum plane and management plane;
The described second control interface module is used for the transmitting-receiving of the data message of described datum plane and control plane;
Described playing programs control module is used to receive the data message from the described second management interface module and the second control interface module, starts or stops the transmission of the multicast source data flow of book server according to the data message that receives;
Described business diagnosis module is used for the progress of the multicast source data flow of book server is sent to second control interface module and the communication control module of this datum plane;
The masterslave switchover that described communication control module is used to analyze the masterslave switchover control message of opposite end server and send book server is controlled message.
2. multicast source master-slave conversion system according to claim 1, it is characterized in that, described multicast agent server is connected with the multicast source standby server with the multicast source master server respectively by the physical transmission medium of sharing, and operation multicast source masterslave switchover control protocol between multicast agent server and the described multicast source server.
3. multicast source master-slave conversion system according to claim 1 is characterized in that, between described multicast source server and the multicast agent server multicast router is set.
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| CN2006101453269A CN101192964B (en) | 2006-11-24 | 2006-11-24 | Master/slave switching system and method for multicast source |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101321077B (en) * | 2008-07-18 | 2011-02-02 | 华为技术有限公司 | Reliable multicast method, provider edge upper layer device and system |
| CN102264001A (en) * | 2010-05-25 | 2011-11-30 | 华为技术有限公司 | Method for enhancing multicast reliability of Internet protocol television (IPTV), server and system |
| CN101902403A (en) * | 2010-07-30 | 2010-12-01 | 中国联合网络通信集团有限公司 | Method and device for enhancing reliability of multicast source |
| CN102123046B (en) * | 2011-01-21 | 2013-09-04 | 烽火通信科技股份有限公司 | Packet transport network (PTN) device and method for realizing time synchronization protection switching (PS) by using main cross disk and spare cross disk of PTN device |
| CN103001785B (en) * | 2011-09-16 | 2016-03-30 | 华为技术有限公司 | Realize method and the MRF system of the redundancy backup of MRF system |
| CN103840963B (en) * | 2012-11-27 | 2017-01-25 | 腾讯科技（深圳）有限公司 | Method and device for updating server data |
| CN103731294A (en) * | 2013-03-28 | 2014-04-16 | 深圳市金溢科技有限公司 | Method, device and system for two-machine hot-standby communication |
| CN104967641B (en) * | 2014-08-15 | 2017-06-23 | 浙江大华技术股份有限公司 | A kind of method and device for realizing active and standby meta server data syn-chronization |
| CN106330542B (en) * | 2016-08-23 | 2020-01-31 | 哈尔滨海能达科技有限公司 | Access method, control device, system and equipment of remote backup switch |
| CN111263199B (en) * | 2018-11-30 | 2022-05-03 | 玲珑视界科技（北京）有限公司 | Multicast channel production control system and method |
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| CN1134938C (en) * | 2001-06-11 | 2004-01-14 | 华为技术有限公司 | Connection switching system at front end of server cluster and its switching method |
| CN1852246A (en) * | 2005-11-25 | 2006-10-25 | 华为技术有限公司 | Method for multi-cast broadcasting flow distribution node to receive multi-cast broadcasting flow |
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| CN1134938C (en) * | 2001-06-11 | 2004-01-14 | 华为技术有限公司 | Connection switching system at front end of server cluster and its switching method |
| CN1852246A (en) * | 2005-11-25 | 2006-10-25 | 华为技术有限公司 | Method for multi-cast broadcasting flow distribution node to receive multi-cast broadcasting flow |
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